I'll have to update then. That was a feature request I had, because without the notification box we cannot get such a remote-control system past our german workers council or even the basic laws for data protection.

Sorry that this is not helpful... we are still on 7.2.1 and to not have this box.

You should be able to deactivate the notification by setting the agent registry value "LANrevRemoteShowConnectionStatus" to DWORD 0 (or similarly the agent defaults value with the same name to NO on macOS). Agent needs to be restarted in order for this to take effect.